scholarly journals Assessment of the resource formation of truck tires in mountainous conditions during the construction of the Rogun hydro power plants

2021 ◽  
Vol 7 (4) ◽  
pp. 396-403
Author(s):  
A.M. Umirzokov ◽  
◽  
F.I. Jobirov ◽  
S.S. Saidullozoda ◽  
A.L. Berdiev ◽  
...  
Keyword(s):  
Power Plants ◽  
Climatic Conditions ◽  
Practical Significance ◽  
Hydraulic Structures ◽  
Hydro Power ◽  
Truck Tires ◽  
Hydro Power Plants ◽  
The Cost ◽  
Cost Of Transportation ◽  
Significant Factors

In the harsh mountainous conditions of the operation of trucks during the construction of hydraulic structures, the car tire is the most vulnerable element that determines the efficiency of the transport process and the cost of transportation. Due to a significant decrease in the resource of truck tires in the harsh mountain conditions, the cost of operating a vehicle increases significantly. The purpose of the study is related to the assessment, adjustment and regulation of the resource, as well as planning the costs of purchasing and the entire life cycle of truck tires operated in mountainous conditions. The work is devoted to the assessment of the formation of the resource of truck tires in the mountainous conditions of the construction of the Rogun HPP, taking into account the influence of the most significant factors. To assess the formation of the resource of truck tires in the mountainous conditions of the construction of the Rogun HPP, an integrated scientific approach was used, taking into account the most significant factors. The assessment of the influence of fluctuations of external influences on the object of research, depending on the conditions and nature of the process of formation of the tire resource was carried out by the probabilistic-statistical method, and the empirical characteristics of the distribution of the above factors were calculated by the method of V.I. Romanovsky. The simplified mathematical model presented in the article can be recommended when adjusting the tire resources of trucks in mountainous conditions during the construction of hydraulic structures (for example, the construction of the Rogun HPP). The practical significance of the work is associated with the selection and planning of the need for automobile tires, operated in mountain conditions. The research results can be recommended for assessing the resource of tires of various standard sizes and designs mounted on trucks of various modifications, operated in various road and climatic conditions during the construction of hydraulic structures.

scholarly journals An Evolutionary Computational Approach for Designing Micro Hydro Power Plants

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 878 ◽  
Author(s):  
Alejandro Tapia Córdoba ◽  
Daniel Gutiérrez Reina ◽  
Pablo Millán Gata
Keyword(s):  
Power Plants ◽  
Optimal Layout ◽  
Pareto Dominance ◽  
Hydro Power ◽  
Linear Approach ◽  
Hydro Power Plants ◽  
Real Scenario ◽  
The Cost ◽  
Practical Feasibility ◽  
Renewable Technology

Micro Hydro Power Plants (MHPP) constitute an effective, environmentally-friendly solution to deal with energy poverty in rural isolated areas, being the most extended renewable technology in this field. Nevertheless, the context of poverty and lack of qualified manpower usually lead to a poor usage of the resources, due to the use of thumb rules and user experience to design the layout of the plants, which conditions the performance. For this reason, the development of robust and efficient optimization strategies are particularly relevant in this field. This paper proposes a Genetic Algorithm (GA) to address the problem of finding the optimal layout for an MHPP based on real scenario data, obtained by means of a set of experimental topographic measurements. With this end in view, a model of the plant is first developed, in terms of which the optimization problem is formulated with the constraints of minimal generated power and maximum use of flow, together with the practical feasibility of the layout to the measured terrain. The problem is formulated in both single-objective (minimization of the cost) and multi-objective (minimization of the cost and maximization of the generated power) modes, the Pareto dominance being studied in this last case. The algorithm is first applied to an example scenario to illustrate its performance and compared with a reference Branch and Bound Algorithm (BBA) linear approach, reaching reductions of more than 70% in the cost of the MHPP. Finally, it is also applied to a real set of geographical data to validate its robustness against irregular, poorly sampled domains.

scholarly journals DECISION SUPPORT SYSTEM FOR HYDRO POWER PLANTS IN AMAZON CONSIDERING THE COST OF EXTERNALITIES

2020 ◽  
Vol 10 (2) ◽  
pp. 40-47 ◽  
Author(s):  
Evelyn Gabbay Alves Carvalho ◽  
Claudio José Cavalcante Blanco ◽  
André Augusto Azevedo Montenegro Duarte ◽  
Luiz Maurício Furtado Maués
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Power Plants ◽  
Hydro Power ◽  
Hydro Power Plants ◽  
The Cost

scholarly journals Effect of Symmetrically Switched Rectifier Topologies on the Frequency Regulation of Standalone Micro-Hydro Power Plants

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3201
Author(s):  
Henry Bory ◽  
Jose L. Martin ◽  
Iñigo Martinez de Alegria ◽  
Luis Vazquez
Keyword(s):  
Power Factor ◽  
Power Plants ◽  
Reactive Power ◽  
Alternating Current ◽  
Frequency Regulation ◽  
Hydro Power ◽  
Major Energy Source ◽  
Hydro Power Plants ◽  
Electronic Load ◽  
Ac Converters

Micro-hydro power plants (μHPPs) are a major energy source in grid-isolated zones because they do not require reservoirs and dams to be built. μHPPs operate in a standalone mode, but a continuously varying load generates voltage unbalances and frequency fluctuations which can cause long-term damage to plant components. One method of frequency regulation is the use of alternating current-alternating current (AC-AC) converters as an electronic load controller (ELC). The disadvantage of AC-AC converters is reactive power consumption with the associated decrease in both the power factor and the capacity of the alternator to deliver current. To avoid this disadvantage, we proposed two rectifier topologies combined with symmetrical switching. However, the performance of the frequency regulation loop with each topology remains unknown. Therefore, the objective of this work was to evaluate the performance of the frequency regulation loop when each topology, with a symmetrical switching form, was inserted. A MATLAB® model was implemented to simulate the frequency loop. The results from a μHPP case study in a small Cuban rural community called ‘Los Gallegos’ showed that the performance of the frequency regulation loop using the proposed topologies satisfied the standard frequency regulation and increased both the power factor and current delivery capabilities of the alternator.

scholarly journals Evaluation of Micro Hydro Power Plants in Central Java toward Sustainability against Hydrology Condition of Watershed

2018 ◽  
Vol 73 ◽  
pp. 01017
Author(s):  
Ignatius Sriyana
Keyword(s):  
Power Plant ◽  
Land Degradation ◽  
Power Plants ◽  
Hydro Power ◽  
Central Java ◽  
Hydro Power Plants

Land degradation on the upstream of watershed will affect hydrology condition in a way that it will disrupt the sustainability of its existing micro hydro. The purpose of this study is to evaluate micro hydro power plant in central Java toward sustainability against hydrology condition of watershed. This study is using River Regime Coefficient (RRC) approach where hydrology of watershed with coefficient value less than 50 is classified as non-critical, between 50 and 120 is moderate and more than 120 is critical. Result of the study that was done on 33 micro hydro power plants scattered on 9 watersheds is showing that there are 2 power plants on 2 watersheds have hydrology condition in non-critical status (9.09%), 1 power plant on 1 watershed is in between critical and non-critical status (3.03%), 21 power plants on 3 watersheds are in between critical and moderate status (63.64%), 8 power plants on 6 watersheds are in critical status (21.21%) and 1 power plant on 1 watershed is in between moderate and critical status (3.03%).

Application of Intelligent Technological Systems in Order to Increase Efficiency of the Lock Chamber System in Hydro Power Plants

2015 ◽  
Vol 806 ◽  
pp. 64-73
Author(s):  
Aleksandar Vujović ◽  
Zdravko Krivokapić ◽  
Jelena Jovanović
Keyword(s):  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Global Market ◽  
Real System ◽  
Hydroelectric Power ◽  
Initial State ◽  
Hydro Power ◽  
Lock Chamber ◽  
Levels Of Automation ◽  
Hydro Power Plants

The paper is a result of research at the Mechanical Engineering Faculty in Podgorica and represents the aspiration of authors to combine scientific and technical experience in order to achieve improvement in a real system. It is a complex system of lock chambers in a hydroelectric power plant. Based on a detailed analysis of the initial state, through the process modeling of complex real system, the authors identify possible areas where the intervening and applying modern systems with greater flexibility is necessary to achieve higher levels of automation. Also, proposed in the paper are measures for ensuring the security of information that rise system performance to a higher level compared to the competition and create an advantage in the global market.

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